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Liquid crystal display device and liquid crystal panel drive method

一种液晶显示、液晶面板的技术，应用在静态指示器、仪器等方向，能够解决显示图像质量下降、闪烁电势未得到解决等问题，达到抑制闪烁的效果

Inactive Publication Date: 2007-11-14
NEC DISPLAY SOLUTIONS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] Patent Document 3 discloses a method for adjusting the common voltage so as to minimize flicker during frame inversion double-speed driving, but the risk of occurrence of flicker being suppressed only by adjusting the common voltage remains, and the potential for conspicuous flicker is not resolved , and the quality of the displayed image degrades

Method used

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  • Liquid crystal display device and liquid crystal panel drive method
  • Liquid crystal display device and liquid crystal panel drive method
  • Liquid crystal display device and liquid crystal panel drive method

Examples

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no. 1 example

[0047] 4 is a block diagram showing a schematic structure of a liquid crystal panel driving module of a liquid crystal display device according to a first exemplary embodiment of the present invention.

[0048] Referring to FIG. 4, the liquid crystal panel driving module can drive the liquid crystal panel 16, and can include the following as its main components: V-T / gamma correction circuit 10; switching circuit 11; look-up tables (LUT) 12a and 12b; liquid crystal driving circuit 13; a control signal generating module 14; and a common voltage generating circuit 15. The liquid crystal panel 16 may include an off-the-shelf liquid crystal panel, and may be, for example, the same as the liquid crystal panel shown in FIG. 2 . Switching circuit 11 and look-up tables (LUTs) 12a and 12b may include components for adjusting the brightness of a displayed image (eg, may include an adjustment module).

[0049] The V-T / gamma correction circuit 10 may have the same structure as the V-T / gam...

no. 2 example

[0076] 6 is a block diagram showing a schematic structure of a liquid crystal panel driving module of a liquid crystal display device according to a second exemplary embodiment of the present invention. The difference between the liquid crystal panel driving module shown in FIG. 6 and the structure shown in FIG. 4 is that LUT20 and offset table 21 are provided instead of switching circuit 11 and LUT12a and 12b. The V-T / gamma correction circuit 10, the control signal generation block 14, and the common voltage generation circuit 15 are the same as those shown in FIG. 4 .

[0077] Characteristic data for adjusting brightness of a display image related to image data of positive polarity or negative polarity may be stored in the LUT 20 . In the offset table 21, characteristic data for returning (shifting) the image data in which the luminance has been adjusted by the characteristic data of the LUT 20 to the image data of the luminance before adjustment can be stored.

[0078] Ima...

no. 3 example

[0083] 7 is a block diagram showing a schematic structure of a liquid crystal panel driving module of a liquid crystal display device according to a third exemplary embodiment of the present invention. The difference between the liquid crystal panel driving module shown in FIG. 7 and the structure shown in FIG. 4 is that a V-T correction circuit 30 and gamma correction circuits 31a and 31b are provided to replace the V-T / gamma correction circuit 10 and LUTs 12a and 12b. The control signal generating block 14 and the common voltage generating circuit 15 are the same as those shown in FIG. 4 .

[0084] The V-T correction circuit 30 is basically the same as the V-T correction circuit making up the V-T / gamma correction circuit 10, and is composed of LUTs. FIG. 8A shows an example of characteristic data of an LUT used for V-T correction in the V-T correction circuit 30 . The vertical axis is output (V), and the horizontal axis is input (V). These characteristic data include data ...

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Abstract

A liquid crystal display device includes a liquid crystal panel including a plurality of liquid crystal cells, a common voltage generation circuit that supplies a common voltage to the liquid crystal panel, a liquid crystal drive circuit that implements control for supplying said plurality of liquid crystal cells with voltage that accords with a video signal to display an image on the liquid crystal panel, and for reversing a polarity of the voltage supplied to the plurality of liquid crystal cells, and an adjustment module that stores characteristics data for correcting fluctuations in brightness and, based on said characteristics data, adjusts the brightness of the image displayed on the liquid crystal panel.

Description

[0001] Cross References to Related Applications [0002] This application has the priority of Japanese Patent Application No. 2006-132364 filed on May 11, 2006, the contents of which are incorporated herein by reference. technical field [0003] The present invention relates to a liquid crystal display device using a liquid crystal panel, such as a liquid crystal projector, and more particularly, to a liquid crystal display device in which a common voltage is applied to a common electrode to which a plurality of liquid crystal cells are commonly connected. Background technique [0004] As a measure against deterioration of liquid crystals in liquid crystal display devices, alternating current (AC) driving is performed in which the polarity of a voltage applied to liquid crystals is reversed at a predetermined cycle. Such AC driving may include, for example, dot inversion driving, line inversion driving, and frame inversion driving. A liquid crystal display device is driven ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/133G09G3/36
CPCG09G3/3614G09G3/3648G09G2320/0247G09G2320/0276G09G2320/0673G09G2340/0435
Inventor 森本健小林玲一
Owner NEC DISPLAY SOLUTIONS LTD
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